I remember seeing about 20 years ago a beautiful annotated commentary on Rambam's hilchos kiddush hachodesh, with extensive illustrations and calculations, explained according to both ancient and modern astronomy. But I have never been able to find it again. Can anyone help point me in the right direction?
http://kiddushhachodesh.net/ has many videos decently done.
New web book presentation of the Rambam’s “Laws Of The New Moon” - Hilchot Kiddush Hachodesh illustrate the Laws with dynamic 3D graphics. And Video lesson for each chapter.